The Botanical Gazette 
A Montbly Journal Embracing all Departments of Botanical Science 
Edited by JoHn M. CouLter, with. the Rear of rsa members of the botanical. staff of the 
University of Chi 
See March oe ais . ; 
- 
Vol.. LVII .. CONTENTS FOR MARCH 1914 No..3 
THE are: OF OPHIOGLOSSUM PENDULUM. ee FROM THE HULL 
CAL LABORATORY 183 (WITH SIXTEEN FIGURES). © Loren C. Petr “ 169 
SOME EFFECTS OF COLLOIDAL MET! ALS ON SPIROGYRA - ITH FOUR ie 
W. D. Hoy, 193 
THE FUNCTION OF MANGANESE IN PLANTS. W. P. Kelley- > - - - - toa the 
THE DEV ELOPMENT OF THE PROTHALLIUM OF CAMPTOSORUS RHIZOPHYLLUS 
: (WITH PLATES KI AND XII AND EIGHT TEXT FIGURES). F. L: Picketi * - * 
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